関連ワード:  boolean data type possible values    boolean data type values    a boolean data type can have possible values    boolean data type can have how many possible values    the boolean data type has only two possible values    the boolean data type has only two possible values dash and dash    boolean data type is a data type with only two possible values    boolean is type of data with only possible values    what is boolean data type    what is the name of the data type for boolean values